Re: NR 1.2.3 Upbeats: confusing explanation of measurePosition

[Federico Bruni]

Il 31/12/2012 00:52, Reinhold Kainhofer ha scritto:
> On 2012-12-30 23:59, Federico Bruni wrote:
> > In NR 1.2.3, Upbeats:
> >
> > """
> > So \partial 8 becomes:
> >
> > \time 3/4
> > \set Timing.measurePosition = #(ly:make-moment -1 8)
> > e8 | a4 c8 b c4 |
> >
> > _The property measurePosition contains a rational number indicating how
> > much of the measure has passed at this point_. Note that this is set to
> > a negative number by the \partial command: i.e., \partial 4 is
> > internally translated to -4, meaning “there is a quarter note left in
> > the measure.”
> > """
> >
> >
> > IMO the first sentence is a bit confusing.
>
> I agree about confusion, but not in the first sentence, but in the last:
> -4 actually means "it needs one quarter note until the measure even
> starts". (\partial inserts a partial measure 0 before the measure 1, and
> measure 1 is the first measure where counting starts)

Ok, I would say "it needs one quarter note until the _first_ measure 
starts" and explain that using a non-negative number would result in 
setting the partial measure as measure 1 instead of measure 0.

--
Federico